Add tooltips to mixed values in semicombo, multicombo, and radio fields

data/core.yaml

@@ -555,6 +555,7 @@ en:
     key_value: "key=value"
     multiple_values: Multiple Values
     multiple_types: Multiple Types
+    unshared_value_tooltip: not shared by all features
     hidden_preset:
       manual: "{features} are hidden. Enable them in the Map Data pane."
       zoom: "{features} are hidden. Zoom in to enable them."

dist/locales/en.json

@@ -694,6 +694,7 @@
             "key_value": "key=value",
             "multiple_values": "Multiple Values",
             "multiple_types": "Multiple Types",
+            "unshared_value_tooltip": "not shared by all features",
             "hidden_preset": {
                 "manual": "{features} are hidden. Enable them in the Map Data pane.",
                 "zoom": "{features} are hidden. Zoom in to enable them."

modules/ui/fields/combo.js

@@ -526,6 +526,9 @@ export function uiFieldCombo(field, context) {
                 .classed('draggable', allowDragAndDrop)
                 .classed('mixed', function(d) {
                     return d.isMixed;
+                })
+                .attr('title', function(d) {
+                    return d.isMixed ? t('inspector.unshared_value_tooltip') : null;
                 });
 
             if (allowDragAndDrop) {

modules/ui/fields/radio.js

@@ -272,6 +272,13 @@ export function uiFieldRadio(field, context) {
             return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
         });
 
+        function isMixed(d) {
+            if (field.key) {
+                return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+            }
+            return Array.isArray(tags[d]);
+        }
+
         labels
             .classed('active', function(d) {
                 if (field.key) {
@@ -280,11 +287,9 @@ export function uiFieldRadio(field, context) {
                 }
                 return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
             })
-            .classed('mixed', function(d) {
-                if (field.key) {
-                    return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-                }
-                return Array.isArray(tags[d]);
+            .classed('mixed', isMixed)
+            .attr('title', function(d) {
+                return isMixed(d) ? t('inspector.unshared_value_tooltip') : null;
             });